Putting an LPS on Coke and Mentos! titled "*FAIL* Putting an LPS on Coke and Mentos!" is the 6th episode of Season 1 on the LPSMarcus channel and the 6th video overall.
Marcus puts an LPS on a coke bottle and then puts mentos in to try and see what will happen but it fails and it was such a failure he almost never uploaded it. Marcus has stated it is his least favourite video on the channel.